Index: Core/Plugins/src/Core.Plugins.Chart/Legend/ChartLegendController.cs
===================================================================
diff -u -r2c5e077a0f546af6d6379eb93111fd8366fc2224 -r3cce996064234d73e4021304ac772d3e373796cf
--- Core/Plugins/src/Core.Plugins.Chart/Legend/ChartLegendController.cs	(.../ChartLegendController.cs)	(revision 2c5e077a0f546af6d6379eb93111fd8366fc2224)
+++ Core/Plugins/src/Core.Plugins.Chart/Legend/ChartLegendController.cs	(.../ChartLegendController.cs)	(revision 3cce996064234d73e4021304ac772d3e373796cf)
@@ -40,7 +40,7 @@
         /// <summary>
         /// Fired when the chart legend has been opened.
         /// </summary>
-        public EventHandler<EventArgs> OnOpenLegend;
+        public event EventHandler<EventArgs> OnOpenLegend;
 
         private ChartLegendView legendView;